In this review, we will be comparing two different types of speakers by JBL. JBL Studio 6 66LCR is a In-wall speaker whereas the Studio 620 is a Bookshelf speaker.
Let's have a brief look at the main features
of JBL Studio 6 66LCR and JBL Studio 620 first before getting into our more
detailed comparison.
| Key Specs | JBL Studio 6 66LCR | JBL Studio 620 |
|---|
| Brand | JBL
United States · founded 1946 | JBL
United States · founded 1946 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" Horn-Loaded | 1" High Frequency Compression |
|---|
| Woofer | 2 x 6.5" PolyPlas | 5.25" PolyPlas |
|---|
| Frequency response | 45-20kHz | 50-40k Hz |
|---|
| Sensitivity | 94 dB | 84 dB |
|---|
| Impedance | 6 ohms | 6 ohms |
|---|
| Power range | 10-150 watts | up to 100 watts |
|---|
| Weight | — | 6.88kg / 15.1lbs |
|---|
| Dimensions (H x W x D) | 17.4375" x 7.1250" x 3.7500"
443.0 x 181.0 x 96.0mm | 12.3" x 7-1/2" x 9-1/2"
312.0 x 190.0 x 240.0mm |
|---|
Studio 6 66LCR and Studio 620 are members of JBL's Studio series of speakers. Below you can find the loudspeakers from this series.
JBL Studio Series
History
What size room are the JBL Studio 6 66LCR and JBL Studio 620 speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision
factor. Here we have compared their suitability to various sizes of environments considering their size
and max power parameters:
| Listening Environment* |
JBL Studio 6 66LCR |
JBL Studio 620 |
| Near-field |
Poor |
Average |
| Small Room |
Average |
Good |
| Mid-size Room |
Good |
Average |
| Large Room |
Average |
Poor |
| Very Large Room |
Poor |
Bad |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2,
Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: >
400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual
listening experience changes depending on floor height, room shape, surface materials, listening
position, speaker locations, etc.)
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
Both Studio 6 66LCR and Studio 620 are 2-way speakers.
JBL Studio 6 66LCRJBL Studio 620
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
JBL Studio 6 66LCR |
JBL Studio 620 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 6.5-inch
|
1 x 5.25-inch
|
Studio 6 66LCR features a 1" Horn-Loaded Tweeter and 2 x 6.5" PolyPlas Woofer. On the other hand, the Studio 620 features a 1" High Frequency Compression Tweeter and 1 x 5.25" PolyPlas Woofer.
Frequency Response
Studio 6 66LCR has a frequency range of 45-20kHz whereas Studio 620 has a frequency range of 50-40k Hz. With a minimum frequency of 45Hz, the Studio 6 66LCR can go significantly deeper on the low side and provide stronger bass compared to the Studio 620's min frequency of 50Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the In-wall class in our database.
Low Frequency
In-wall Speakers
Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Studio 6 66LCR and Studio 620 have the same Impedance of 6 ohms but where they differ is the sensitivity levels. Studio 6 66LCR sensitivity is rated at 94 dB and the Studio 620's is at 84 dB. This 10 dB difference makes the JBL Studio 6 66LCR a more sensitive speaker compared to JBL Studio 620, hence will play louder with the same amount of watts.
Sensitivity
In-wall Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Studio 6 66LCR can handle a max power of 150 watts RMS, whereas Studio 620 has a max power handling value of 100 watts RMS, 50 watts less than the Studio 6 66LCR.
Note that higher power handling does not make a speaker louder: that depends mainly on
sensitivity and impedance. The calculator below shows how loud each of these actually plays
on a real amplifier.
Which plays louder on your amplifier?
Starting with a popular amplifier - change it to the one you own, or any you are
considering, and watch both numbers move.
Input Type and Bi-Amping / Bi-Wiring
Studio 6 66LCR features 5-Way post type posts and Studio 620 has a 5-Way post type posts. None of these speakers feature bi-amping/bi-wiring.
Physical Specs
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare JBL Studio 6 66LCR's and JBL Studio 620's external dimensions. JBL Studio 6 66LCR has external dimensions of 443.0 x 181.0 x 96.0mm (17.4375-inch x 7.1250-inch x 3.7500-inch) whereas JBL Studio 620 has external dimensions of 312.0 x 190.0 x 240.0mm (12.3 x 7-1/2inch x 9-1/2inch).
JBL Studio 6 66LCR is 9mm narrower and 144mm less deeper than JBL Studio 620 but it is also 131mm taller.
What's in the Box of JBL Studio 6 66LCR?
Here are the items that are included inside the box of Studio 6 66LCR:
- In-wall loudspeaker
- Grille
- Cut-Out Template
- Quick Start Guide
What's in the Box of JBL Studio 620?
Here are the items that come with the Studio 620:
- 2 x JBL Studio 630 Bookshelf Loudspeaker
- 1 x Owner’s Manual
- 1 x Warranty Card
- 8 x Feet Pads